Full Idea
A man cannot be virtuous, if he has no regard to duty.
Gist of Idea
To be virtuous, we must care about duty
Source
Thomas Reid (Essays on Active Powers 3: Princs of action [1788], 5)
Book Reference
Reid,Thomas: 'Inquiry and Essays', ed/tr. Beanblossom /K.Lehrer [Hackett 1983], p.315
A Reaction
Thus are Aristotle and Kant united in a simple sentence. Aristotle thinks that a virtuous person thereby sees what is the right thing to do, but I take 'duty' to imply a requirement which comes not from good character but from external society.